Tim Trepid is highly risk-averse while Mike Macho actually enjoys taking a risk. Investments Buy stocks Buy bonds Buy commodity futures Buy options Returns: Expected Value $ 9,580 7,610 17,100 19,200 Standard Deviation $ 6,500 2,600 29,300 16,400 a-1. Compute the coefficients of variation. (Round your answers to 3 decimal places.) Coefficient of Variation Buy stocks Buy bonds Buy commodity futures Buy options a-2. Which one of the following four investments should Tim choose? Buy bonds Buy stocks Buy commodity futures O Buy options b. Which one of the four investments should Mike choose? Buy bonds Buy stocks O Buy commodity futures O Buy options